Some access keys in the Bookmarks Manager editing pane conflict with the menu.
Created attachment 523160 [details] [diff] [review] Proposed patch "k" of Bookmarks (during search) conflicts with Keyword, changed to "B". "e" of More/Less conflicts with Edit. Changed to "r" of More/Fewer. Changed "r" of (Selected Folder during search) to "m". "h" of Load in Sidebar conflicts with Help, changed to "o". "T" of Tags conflicts with Tools, changed to "a".
So, I'm go for holding out a brief bit on this one. That said, 4.0.1 of Firefox is being shipped late April, and is the ONLY release on that branch, so we need to catch up, FAST. I won't hold this past monday night.
Pushed changeset eb3646fba1a6 to comm-central.